Ive grown Greenhouse Seeds fems without any issues. It all started back when I was against feminised seeds before I had tried them, just based on research that used to be my oppinion. However a friend brought me over a mix pack of Greenhouse Seeds fems when he was in Holland. Since then I have purchased and grown out more GHS fems from Gypsy Nirvana Seed Boutique, and The Attitude. The strains were Trainwreck, The Church, White Rhino, White Widow, and AMS. None of them hermd and my temps hit 90f at times and I am by no means a pro grower yet so im sure they were stressed in ways I didnt even know about lol. Still turned out sexy. The Church and Trainwreck were the two strains out of that pack that I'd grow again. The others were fine just not as unique tasting and not as enjoyable of a high imo. Im currently veging the Greenhouse Seeds Indica Mix H 10-pack which is trainwreck, lemon skunk, the cheese, Great White Shark (ive heard this is the best of their white family), white rhino (mainly growing again cuz I want a comparison to the great white shark and plan to clone the WR for my outdoor grow since it is a very strong plant and my least favourite of this pack, so if it gets found or stolen I won't be as pissed as if it were the trainwreck). I also have some DNA Kushberry fems and Greenhouse Bubba Kush fems that im growing out for a friend who paid for the seeds and offered me half the harvest.
I have heard from experienced growers though that some strains have a higher tendancy to hermie. Might be good to research some journals of the specific strains you are interested in to see if they are high risk.